data_global
_chemical_name_mineral 'Lamprophyllite'
loop_
_publ_author_name
'Krivovichev S V'
'Armbruster T'
'Yakovenchuk V N'
'Pakhomovsky Y A'
'Men'shikov Y P'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 15 
_journal_year 2003
_journal_page_first 711
_journal_page_last 718
_publ_section_title
;
 Crystal structures of lamprophyllite-2M and lamprophyllite-2O
 from the Lovozero alkaline massif, Kola peninsula, Russia
 Note: displacement factors have been altered by Krivovichev, November 2003
;
_database_code_amcsd 0007013
_chemical_compound_source 'Lovozero alkaline massif, Kola peninsula, Russia'
_chemical_formula_sum 'Ti3 Si4 Na3 Sr2 (O18 H2)'
_cell_length_a 19.128
_cell_length_b 7.0799
_cell_length_c 5.3824
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 728.908
_exptl_crystal_density_diffrn      3.600
_symmetry_space_group_name_H-M 'P n m n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2-x,1/2-y,1/2+z'
  'x,-y,z'
  '-x,y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ti1   0.34914   0.00000   0.14420   0.00270
Ti2   0.00000   0.00000   0.00000   0.02540
Si   0.14413   0.21610   0.14400   0.00410
Na1   0.50000   0.25880   0.00000   0.00850
Na2   0.50000   0.00000   0.50000   0.01100
Sr   0.21584   0.00000   0.64530   0.01260
O-H1   0.05700   0.00000   0.70200   0.01900
O2   0.32390   0.18640   0.39520   0.01100
O3   0.32500   0.18670   0.89000   0.00970
O4   0.17770   0.00000   0.14480   0.00500
O5   0.05930   0.20440   0.14780   0.01020
O6   0.43760   0.00000   0.14100   0.01900
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ti1 0.00100 0.00230 0.00480 0.00000 0.00020 0.00000
Ti2 0.02400 0.00540 0.04700 0.00000 -0.02800 0.00000
Na1 0.00900 0.00500 0.01200 0.00000 -0.00240 0.00000
Na2 0.01200 0.00800 0.01300 0.00000 -0.00500 0.00000
Sr 0.01350 0.00970 0.01450 0.00000 -0.00010 0.00000